Brick-grinding machine



June .24, 1930.

A. JONES BRICK GRINDING MACHINE 5 Sheets-Sheet 1 Filed Aug. 12. 1927 lNVENTOR 5 AJONES BY ATTORNEY June 24, 1930. JONES 1,767,136

' BRICK GRINDING MACHINE Filed Aug. 12, 1927 5 Sheets-Sheet 2 0 84K F1g.3.

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5 Sheets-Sheet 3 Filed Aug. 12, 1927 A TORNEY June 24, 1930. A. mu s 1,767,136

, mucx GRINDING MACHINE Y Filed Aug. 12, 1927 5 Sheets-Sfieet 4 Fig.9.

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INVENTOR moms ATTORNEY June 1930. A. JONES BRICK GRINDING MACHINE} Filed Aug. 12, 1927 5 Sheets-Sheet 5 Patented June 24, 1930 IUNITED stares PATENT OFFICE ARTHUR JONES, on BELLnvILLn, ILLInoIs, ASSIGNOB Ion. s. SMEL'IING FURNAGE' COMPANY; on BELLEVILLE, ILLINoIs; A CORPORATION or" ILLINOIS BRICK-GRINDING MACHINE Application filed August 12, 1927. Serial No. 212,395

invention relates to a'brick grinding machine and particularly to one adapted to grind the contacting faces of the lining bricks of furnaces-to insure uniform sizes and angles. In this manner satisfactory tightjoints are secured between the bricks without chipping or fitting of any'lrind 'and repairs to the lining are facilitated.

In the accompanying drawings, which illustrate one form of grinding machine made in accordance with my invention, Figure 1 is atop plan view the brick positioning devices and a portion of the table being broken away; Figure 2 is an enlarged sectionalview showing the grinding wheel cross feed; F igure 8 is an end view of the front part of the machine; Figure 1 is adetail View of the dust exhaust head; Figure 5 is a front view of the brick positioning devices; Figure 6 is a cross section; Figure 7 is a top plan view ofthe gauge frame; Figure 8 is a top plan View of the brick base; Figure 9 is a bottom plan'view of the table yoke; Figure 10 is an enlarged view of the table latch; Figurell is a vertical section-through the the table and table yoke; Figure 12 is a bottom plan View of the table latch ring; Figure 13 is an enlarged sectiontaken 0n the line 13-13 of Figure 9; Figure 14 is a side view of one of the gear quadrants; Figure 15 is a section taken on the line 15-15 of Figure 14; and Figure 16 is a section taken on the line 1616' of Figure 11. p

The body of the machine consists of a frame work or casing 1, having on its top guide rails 2 on which runs a longitudinally movable carriage 3 connected by an arm 4; (Figure 6) with a feed screw 5. This feed screw is driven from a motor 6 through worm gear 7, reverse gearing 8, and the usual speed change gearing (not shown). Formed on the carriage 3 are guide rails 9 on which runs the cross carriage 10 upon which is mounted a motor 11. Carried on the motor shaft is the grinding wheel 12, referably in the form of a cup wheel. gurrounding the grinding wheel is a' dust exhaust head 13 provided with upper and lower lips 14: extending beyOndthe face of the wheel to catchthe fine particles thrown off during the process of grinding. The interior of the exhaust head is hollow and communicates with the lips through horizontalslots 15 and with a lateral extension 16 through a vertical Connected to this extension is a flexible pipe 18 leading to an exhaust fan (not shown). The suction created through the head carries away the fine dust which would be "in jurious if breathed by the operator. Ase't screw 19 secures the head to a sleeve 20"externally threaded at its rear end and engaging with an internally threaded split collar 21 carried by the cross carriage 10 and provided with a clamping bolt 22. When theset-screw 19and clamping bolt 22 are loosened the sleeve may be rotated to adjust the exhaust head'with relation to the front face of the grinding wheel as the wheel wears away.

Secured to one edge of the carriage 10 is a rack 28 (Figure 2)" which is'engaged by a pinion wheel'24t in a-hou'sing 25 secured to the carriage ,Wheel 24 is carried on a shaft26 operated by a ratchet handle 27 to actuate the cross carriage. Formed inthe edge of the carriage 1O opposite the rack 23 slot 17 (Figure 1) is a T-slot 28 (Figure 6) in which is an ad justable stop 29 adapted to engage with sto 30 adjustaly carried on a T-slot 31 (Fig ure 1) in the carriage 3.

Secured to the front face of the frame are a pair of brackets 32 provided with bearings in which are journaled the trunnions 83 ofthetable yoke 34. The front end of the yoke is provided with a cylindrical opening 35 .to receive the hub 36 of adapted to be rotated to present dissent faces ofthe brick to the grinding wheeh A clamping. bolt 88 'passes down through the table and through a spider 39 to which itis keyed to prevent rotation. The lowerend of the bolt is threaded-and is engaged by a hand wheel 0 for clamping the table and yoke together in any desired position. secured to the'under side of the table is a latch ring 41 provide'd'with a flange in which' are formednot'ohes l adapted to be engaged by the table 87, which is circular inform and loo a latch bar 43 sliding in a slot 44 in the table yoke. Formed in the front edge of the bar 43 are rack teeth 45 engaged by a pinion 46 journaled in lugs 47 on the yoke and provided with a handle 48. By operating the handle the latch bar may be thrown into engagement with one of the notches 42 to position the table at any of the commonly used angles. Other angles may be secured by means of a graduated ring 49 surrounding the flange of the latch ring.

Interposed between the brackets 32 and the yoke 34 are a pair of gear quadrants 50 which are rigidly secured to the yoke by bolts 51 so as to swing the yoke on the trunnions'33 and incline the table, as shown in Figure 3. The quadrants are provided with teeth 52 engaged by pinions 580m a shaft 54 journaled in brackets 32 and provided with hand wheel 55. It will be evident that by rotating the hand wheels 55 the table may be inclined to any desired angle and this movement of the table is facilitated by a counter-balance weight 56 suspended within the casing 1 from an arm 57 projecting from the rear end of the yoke 34. On the outer face of each of the quadrants is a graduated limb 58 cooperating with an index finger 59 carried by the adjacent bracket 32. Formed in each of the quadrants is a T-slot 60 in which is the head of a bolt 61 the outer .end of which is surrounded by a stop block 62 and a clamping nut 63. This stop block 62 is adapted to contact with a stop 64 on the bracket 32. After the proper angle of the table has been determined by the limb 58, the stop block 62 is brought against the stop 64 and secured in position by the nut 63. The table can now be quickly and accurately brought into the same angular position after it has been returned to horizontal position. The horizontal, or approximately horizontal position, is accurately determined by an adjustable screw striking against a stop 66 on the bracket 32. In order to clamp the table in the proper angular position the T- slot 60 of the right hand quadrant, is provided with a bolt 67, similar to the bolt 61, passing through anopening inthe adjacent bracket 32 and engaging with nut 68 having a handle 69.

" Formed on opposite sides of the yoke 34.

are lugs 70 in which are secured studs 71 passing through lugs 88 on the quadrants to tie the outer ends of said quadrants together and extending slightly beyond the periphery of the table. On each stud is a clamping block 72 adapted to bear against the lower face of the table and an upright 73 extending upwardly adjacent to the edge of the table. T-slots 74 are formed in the upper face of the table to receive the heads of clamping bolts 75 for securing the brick base 76. The bolts engage with slots 77 in the ends of the base which is provided with three points 7 8 for supporting the brick 79 which is to be ground. Sliding on each of the uprights 7 3 is a sleeve 80 adapted to be secured in position by a clamping screw 81. Detachably carried by the sleeve 80 is gauge frame 82 (shown in detail in Figure 7), which is rectangular in form to position bricks of the shape shown in the drawings. Different forms of gauge frame may, however, be substituted when different shapes of bricks are to be ground, such for example, as those used in the conical ends of rotary furnaces. The gauge frame is provided on both sides and one end with adjustable gauge screws 83. The upper ends of the uprights 73 are connected by a cross bar 84 in which is threaded a clamping screw 85 having on its lower end a swivel block 86 and on its upper end a hand wheel 87.

The operation of my grinding machine is briefly as follows: A brick base 76 adapted to the size and form of brick to be ground is secured to the table and a corresponding gauge frame 82 to the sleeves 80. The brick 79 is now placed on the base, the gauge frame lowered into the position shown in Figure 5 to accurately center the brick on the table and the hand-wheel 87 rotated to bring the swivel block 86 firmly against the brick to lock it in position, after which the gauge frame is raised into the position shown in Figures 3 and 6 and secured by means of clamping screws 81. The various stops are now adjusted to bring the brick to the exact form and size desired after which any number of brick can be brought to the same size and form without further adjustment except that as the grinding wheel 12 wears away it will be necessary to move the exhaust head a corresponding distance backward and the front stop 30 forward.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a device of the class described, the combination with a frame, of a laterally and longitudinally movable grinding wheel car ried thereby, of a pair of brackets carried by said frame, a yokepivotally mounted in said brackets, a toothed quadrant secured to said yoke, a pinion insaid brackets and engaging the quadrant, a T-slot in said quadrant, a stop adjustably mounted in said T-slot and adapted to engage one of said brackets, clamping means carried by said brackets and engaging the T-slot, a table rotatably mounted in said yoke, and means for securing a brick on said table.

2. In a device of the class described, the combination with a frame, of a laterally and longitudinally movable grinding wheel carried thereby, of a pair of brackets carried by said frame, a yoke pivotally mounted in said brackets, a pair of toothed quadrants secured. to the yoke at their inner ends, a pair of studs carried by the yoke and engag ng with the quadrants, a table rotatably mounted in said yoke, a pair of uprights carried on said studs, and means on said uprights for securing a brick on the table.

3. In a device of the class described, the combination with a frame, of a laterally and longitudinally movable grinding wheel carried thereby, of a pair of brackets carried by said frame, a yoke pivotally mounted in said brackets, a pair of toothed quadrants secured to the yoke at their inner ends, a pair of studs carried by the yoke and engaging with the quadrants, a table rotatably mounted in said yoke, a pair of uprights carried on said studs, a pair of clamping blocks on said studs engaging the lower face of the table, and means carried by the uprights for securing a brick on the table.

4:. In a device of the class described, the

combination with a grinding wheel, of a rotating and tilting table, a brick support on the table, a pair of uprights adjacent to the table, a gauge frame vertically movable on said uprights to locate a brick on the support in one position and to be out of the path of the grinding wheel in another position, and means carried by said uprights for clamping a brick on said table.

5. In a device of the class described, the combination with a grinding wheel, of a rotating and tilting table, a detachable brick support on the table, a pair of uprights adjacent to the table, a detachable gauge frame vertically movable on said uprights to locate a brick on the support in one position and to be out of the path of the grinding wheel in another position, and means carried by said uprights for clamping a brick on said table.

6. In a device of the class described, the

combination with a grinding wheel, of a rotating and tilting table, a three-point brick support on the table, a gauge frame having adjustable gauge points on both sides and one end for positioning the brick on the support, and means for clamping a brick on the support.

7. In a device of the class described, the combination with a grinding wheel, of a r0- tating and tilting table, a three-point brick support on the table, a pair of uprights adjacent to the table, a gauge frame vertically movable on said uprights and having adjustable gauge screws at both sides and one end for positioning a brick on the support, a cross bar carried by said uprights, and a prick clamping screw carried by said cross In testimony whereof, I hereunto aflix my signature, this 10th day of August, 1927.

ARTHUR JONES. 

